Excavating-tool.



l ATENTED MAY 9, 1905.

J. G. BREBN.

EXGAVATING TOOL.

APPLIOATION FILED AUG. 4, 1904.

STATES Iatented May 9, 1905.

PATENT OFFICE.

EXCAVATlNG-TOQLn SPECIFICATION forming part of Letters Patent No. 789,525, dated May 9, 1905. Application filed August 4, 190a. Serial No. 219,441-

To (all w/wm, it may concern-.-

Be it known that I, JAMES C. BREEN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in ExcavatingMachines, of which the following is a specification.

My invention relates to improvements in excavating-tools in which an anger is provided with a sleeve slidably mounted in and supported by an adjustable frame; and the object of my improvements is to provide a device of the character stated which shall be particularly adapted for removing earth from the breast of sewer-tunnels and the like.

In the drawings, Figure l is a side view of my device, partially in section; Fig. 2, a view of the left-hand end of Fig. 1 with the auger removed, and Fig. 3 a side sectional view of a modified form.

Referring to the drawings in detail, a represents a screw-bit, and a the stem of same, through which is an opening to receive the cross-bar a", the purpose of which will hereinafter appear. Surrounding the bit is a sleeve b, provided near its rear end with the side opening Z" and having on opposite sides the longitudinal ribs 5 the purpose of which will soon appear. Said sleeve is supported by an armor frame 0, provided with an opening 0 to receive the sleeve and with interior grooves c to slidably receive the ribs 6 whereby the sleeve is prevented from revolving with the auger-bit, which latter may be driven by any suitable power, preferably by a flexible shaft applied to the end of the stem.

The arm or frame 0 is designed to bemounted upon a car and to be laterally and vertically adjusted by means of suitable levers or other means applied thereto.

In operation the device is placed in proper position, with the screw end of the bit pointing toward the breast of the tunnel. The bit is then set in motion and pushed forward, and as it penetrates the earth the bar a pressing against the rear end of the sleeve, causes the latter to follow the bit, the displaced earth being carried rearwardly through the sleeve.

and ejected through the openings Z) or through the rear end of the sleeve.

1n the modified form shown in Fig. 3 of the drawings I employ in place of the bar a two or more forked prongs a to engage the rear end of the sleeve and carry the latter forward with the bit.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a device of the character stated, a screw-bit provided with a stem, a sleeve surrounding said bit and having formed therein openings, 1/, and provided with exterior longitudinal ribs, means connected with the stem of the bit and adapted to slidably engage the rear end of the sleeve, and a supportingframe provided with an opening to receive the sleeve and having interior grooves adapted to slidably engage the ribs on the sleeve substantially as described.

2. In a device of the character stated, a bit, a sleeve surrounding said bit and provided with an exterior longitudinal rib, means connected with the bit and adapted to engage and cause the sleeve to follow the bit, and a frame adapted to support the sleeve and provided with a groove to engage the said rib.

In testimony whereof I aflix my signature in presence of two witnesses.

JAMES C. BREEN.

Witnesses:

D. DANKS, O. K. TREoo. 

